Hinge.



M, M.- ROBERTS.

HINGE. PPLIQATIQN FILED J'ULY10,1912

` Patepted sept. 2, 1913.,

2 SHEETS-SHEET 1.

M. M. ROBERTS.

HINGE.

APPLIOTION FILED JULY 1o, 1912.

1,0.'72364- Patented Sepng, 1913.

2 SHEETS-SHEET 2.

nNrrED srkrns PATENT oirrcn.

MARIN M. ROBERTS, O F G-GSSETT, ILLINIS :einen Specification of'Letters Patent. i

Patented Sept. 2, 1913.

Application filed July 10, 1912. Serial No. 708,727. v v

others skilled 'in the art to which it apper` tains to make and use thel invention, reference being had t0 the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 is a perspective view of thel invention with the door open to about ninety degrees. Fig. 2 is a side v iewA of. the invent-ion with the door closed.. Fig. 3 is a side View of the invention with the door fully open. Fig, 4 is a plan view of the blank for one of the hinge members. Fig. 5 is a similar view of the blank for the other hinge member having the screw threads in dotted lines.

The invention relates to hinges designed to be used chiefly for doors, and it consists in the novel construction and combinations of parts, .as hereinafter set forth.

The object of the invention is to 'providel improved right and left hinges which can be readily made of wrought or pla/te steel, and are of such character as to possess import-ant functions with reference to the operation of the door.

In the' accompanying drawings, illustrating the invention, the numeral 2 indicates the stationary leaf of the hinge, which is designed to besecured to the casing, and 3 the movable leaf, which is to be secured to the door. Numerals t and 5 represent the blanks for these leaves, which are cut of plate steel. In these blanks, which are designed to intel-fit to avoid waste'of material, the movable leaf blank is cut ont at the .lower edge to provide plate material for oset knuckle 7, and above the Same and l separated therefrom by an'interval of sutilcient extent to receive a knuckle of the movable leaf, a second knuckle 8, which is located below the upper margin of the plate sufficiently to allow for the reception of the upper knuckle of the movable leaf, sothat the upper edges of the two plates will be substantially on the same level when the leaves are closed together.

The top or upper edge of the upper knuckle 8 is plane and horizontal, as is also the bottom A of the lower knuckle 7. The top of this lower knuckle 7 isp'rovided with a low incline 9, extending upward slightly from the edge of the plate to a salient an lev 10, about one-third the circumference of t e knuckle, beyond which a downward sharper incline 12 extends for another third of such circumference to a rentrant angle or low point 13, whence the knuckle ledge extends slightly upward to the plate, its end being` brought in juxtaposition with'o-r engaging the initial portion of the 'bend of the knuckle, at a pointl below the commencement of the incline 9.

The bottom edge of the upper knuckle V8 of this late extends outward from the plate, an substantially level, a short distance, to the commencement of a reversed downward incline 14, which is of similar slope but longer than the incline 12 of the lower knuckle, the point of its commencement being nearer the plate than the salient 10 or point of commencement of the 4incline vertical line of the salient 10, and that the reversed incline shall be in bearing position when the lower incline 12 commences to act `on the intermediate or lower knuckle of the incline 22, and on its lower edge a parallel reversed incline 23, of less length.

portion 24 of the hinge pintle 25, which is ing horizontal portQIlS 0f the edge' This' y leaves tit together, as do the edges of the intermediate formed with a. s'houlderedhead 26 `which is provided with av wrench seat.` The pintle is in this way designed to Ibe firmly secured to this knuckle and, while it engages the two knuckles ofthe other leaf and the 1ntermediate knuckleyof the movable leaf, it is prevented from being worked, by the up and down movements of the door, out of position.

The upper edge or top of the lower knuckle 2 1 `of the movable leaf is usually formed'with vertical shoulders 27 terminat- :cdge is also provided as above stated Awith an extended incline 22;.of' equal angular degree to the long rev'rsed incline 14 of the other leaf, so that these inclines work upon each othenand lap when the door is closed. The lower edge of this knuckle is provided with three reverse inclines, corresponding to the inclines of the upper edge ofthe lower knuckle of the stationary lea'ffthe iirst incli-ne extendin slightly downward from the leaf as at 29 or about one third of its circumference to a salient angle 31, whence ,the second and sharper reverse incline eX- tends upward as at 23 to a rentrant angle, from which the third'reverse incline 2S eX- tends slightly downward to the body of the' plate above the initial point of the knuckle edge. The bottom or reversed incline 23 has the same angular direction as the incline 22 of the upper edge of this knuckle.y which extends beyond the vertical line of the salient 3l, or nearer to the hinge plate.

When the hinge or door is closed, the meeting, edges of the upper knuckles of the meeting edges But the,- meeting knuckles are separated, except at the lap of the long inclines 14 and 22 hereinbefore referred to.

When the door is being opened, the Inoving leaf of the hinge rides upward, because of the engagement of the reversed incline of its lower knuckle with the upward incline of the knuckle of the stationary leaf, until the salient angle of the movable knuckle passes that of the stationary knuckle, after which the movable leaf and door fall slightly and gradually, because of the engagement of the of the lower knuckles.

flatter inclines in rear of these salient angles. In this 'manner is designed to cause the door to assist the opening movement by its own gravity-the action continuing until the j door; 1S fully open.

tVlfllien'the door is being closed, and as the salientf angles of the lower knuckles ass each '.othe'r," the sharper closing inclines ome into faction, under the gravitation of the door,`;to bring it to closed position. At the Sametime 'the long bottom incline of the in- 'when shut to secure a close ter-mediate knuckle of the stationary leaf engages the long incline of the movable leaf, and is designed to force the door downward' to close upon its sill and vto keep it in that position, because of the lap of these inclines. This lap bearing also strengthens the knuckles when the hinge is closed, because of their mutual bracing effect.

The operation of these hinges is designed to cause the door to rise high enough in opening to clear rugs, carpets and mats, and or watertight joint with the sill.

The movable plate may be of any angular form, thatwiswgto say, bent'at rightV angles to thewpitinnext the knuckles, in order to provide a more extended bearing to be applied to the face of the door instead of the rear edge. In this way theattachment surfaceor purchase on the door is made sul`- cient to secure the leaf or plate firmly against a tendency to become loosened because of the resistance of the inertia. of the door in. its up and down movements in opening and closing.

Having described the invention, what I claim and desire to secure by Letters Patent lis:

1. A hinge comprising in its construction, a stationary leaf having the top of its lower knuckle provided with a middle sharp inoline of about one-third its circumference rising toward the leaf, and yon each side thereof flatter parallel in clines, and the bot'- tom of its lupper knuckle provided with a sharp incline of the same degree of slope as said middle sharp incline but lesser length, a movable leaf having between and engaging both knuckles of the ,stationary Aleaf a knuckle provided on its lower edge with a middle sharp incline rising from the leaf and lateral Hatter parallel inclines corresponding to those of said lower knuckle, and on its upper edge with a sharp incline parallel to said middle incline and 4engaging the incline of the other leaf.

2. A hinge comprising in its construction, a stationary leaf .having a lower knuckle ,provided on its upper edge with a middle upward incline rising frein the leaf and joining a downward incline at a salient angle, and an upper knuckle provided o n 1ts lower edge with an upward incline rising from the leaf and extending `beyond the apex of such salient angle, and a right-angular movable -leaf having an intermediatev knuckle provided on its lower edge withY a vmiddle upward incline rising from the leaf and joining a downward incline at a 4salient angle, and on its upper-edge with an upward incline extendingl beyond the4 apeX of the latter salient angle to provide a bracing and lapping engagement with the upward 1ncline of the upper knuckle of the otherleaf.' 3. A pair of plate blanks for a hinge, comprising a leaf blank having its upper edge 'rectangularly cut out, and its middle por tion angularly lrecessed between knuckles offsets having inclined angular edges inarginal to said recess, and a corresionding leaf blank having an upper rectangular knuckle offset, a lower knuckle o'fset itting the inclined angular edge of the lower knuckle offset of the :first leaf blank and an intermediate recess corresponding' to the 10.

" MARION M. ROBERTS.

Witnesses CHAS. C. GREENE, W. L. MATHERBY.

Copies of thispatent may be obtained for ve cents each, by addressing the Commissioner of Patents,A 1 Washington, D, G. Y 

